The EBV-129-AC Electronic Control Module is designed for use with Sloan Optima G2 and ECOS Sensor Water Closet Flushometers. This module provides precise water flow management, offering both 1.28 and 1.6 GPF (gallons per flush) settings for reliable, touch-free operation of both water closets and urinals, optimizing water conservation. The system includes the electronic control module, a sensor assembly, and all necessary installation components. It is powered by 4 AA (not included), ensuring reliable performance while maintaining energy efficiency.